I have an MP2 5000 configured with a JKBMS battery and connected via RS485 - this is broadly working (settings configured, and data is visible within Venus OS.
The MP2 is connected with a CT clamp on my grid connection, some loads on AC In, and some loads on AC Out. There is also some AC coupled Solar on AC Out. As showing in this diagram.
Whenever I set the Multiplus to use the grid CT (so I can get the battery to absorb excess solar) the MP2 goes into Passthrough mode and nothing happens. I can set it to use internal CT and then it absorbs some of the excess solar, but seems unpredictable what.
I feel like Im going around in circles changing things in VEConfigure, plus in VRM portal, plus in the Remote Console, yet nothing seems to have the effect Id expect… Im sure I must have a setting wrong somewhere, but Id love some assistance working out which one!I would say Im quite good at troubleshooting things, but I dont have a single place that shows all information (and what CTs are measuring) so Ive included a few screenshots for reference.
Assuming the ‘External Meter’ on ‘Grid metering’ doesnt mean what I think, and is expecting an ET112, but if so I still cant really explain the inverter behaviour since it doesnt charge anywhere near fast enough to absorb the excess solar (either absorbs a little or nothing). (I assume MP2 ignores internal meter when using external CT)
Contact terminal, but I have triple checked it is wired into COM+EXT as directed. I have since this noticed that disabling Dynamic ESS changes behaviour quite significantly, so will have to monitor this and work out if that was causing things to behave strangely…
Thanks very much, ok I understand that component of setup now - should have guessed based on disconnecting the internal CT. Though I do think it is poorly labelled.
However Im still getting very unpredictable behaviour, my solar is reliably 100-300W above my household usage at the moment, but the battery is still not charging and I cant for the life of me work out why…
How reliably should the MP2 manage to ‘sink’ excess current generated by solar? Im definitely finding it to be 50% effective at best… Given I have other CTs that measure current reliably I assumed the MP2 would be able to reliably keep the grid draw to 0…
Another weirdness is that on the Advanced page, most readings are blank, and on the device list the Multiplus shows offline, however it is reporting everything to VRM correctly. The multiplus also seems to think it is connected to VRM, so I dont know why VRM thinks it is disconnected…
